My nice new conroe system has died 
Worse still is that I've voided the warranty on the e6600 by sanding down the IHS because it was raising temps so much initially.
I've been running it pretty much since I got it at 3.6ghz, and with an arctic freezer 7 pro with a 120mm exhaust right behind it, I was running it at 3.6ghz at around 66-69C core temp. It was 12 hours orthos stable yesterday at 1.344 load volts (1.425 bios).
Today I got a Tuniq Tower and fitted it, temps were better, it didn't look like I'd mangled anything putting it together but then the problems started. First was the PC actually froze 20 minutes into another orthos run when trying to heat it up.
After that it has been patchy about booting, I got it to boot at 2.4 a couple of times, I got it to boot once after resetting the bios and now it just wont boot at all whatever memory I put into it. I've reseated the CPU, tried another video card (7300gt which works in my sisters pc) and with that, that's all the hardware I've got available.
Here's all the parts:
Gigabyte DS3 with F8i bios, no mods done to it
E6600 with sanded down IHS
2x 1GB Hynix PC4200 that runs at 400mhz cas 4
Corsair HX520 psu
seagate 7200.10
A simple case, usually run with the side off
a 7900GTO
The symptom this pc presents me with now is when I turn it on, the HD and DVDRW spin up, the red HD light shows and after a few seconds the video card fan spins up to full speed, there are no beeps, no video output, resetting does nothing.
When working it spins up HD and DVDRW then beeps, screen comes up, all is well.
I've tried running it with 1 or no sticks of ram, it beeps when there's no ram like it should and I dont have any good DDR2 to test on it and it's not doing what I've seen the DS3 do when the memory is badly seated/running too fast, which is turning itself off and on until its happy.
To be honest, I've only seen this stuff happen when cpus die, and I'm really worried it's that
Do you guys have any ideas?

Worse still is that I've voided the warranty on the e6600 by sanding down the IHS because it was raising temps so much initially.
I've been running it pretty much since I got it at 3.6ghz, and with an arctic freezer 7 pro with a 120mm exhaust right behind it, I was running it at 3.6ghz at around 66-69C core temp. It was 12 hours orthos stable yesterday at 1.344 load volts (1.425 bios).
Today I got a Tuniq Tower and fitted it, temps were better, it didn't look like I'd mangled anything putting it together but then the problems started. First was the PC actually froze 20 minutes into another orthos run when trying to heat it up.
After that it has been patchy about booting, I got it to boot at 2.4 a couple of times, I got it to boot once after resetting the bios and now it just wont boot at all whatever memory I put into it. I've reseated the CPU, tried another video card (7300gt which works in my sisters pc) and with that, that's all the hardware I've got available.
Here's all the parts:
Gigabyte DS3 with F8i bios, no mods done to it
E6600 with sanded down IHS
2x 1GB Hynix PC4200 that runs at 400mhz cas 4
Corsair HX520 psu
seagate 7200.10
A simple case, usually run with the side off
a 7900GTO
The symptom this pc presents me with now is when I turn it on, the HD and DVDRW spin up, the red HD light shows and after a few seconds the video card fan spins up to full speed, there are no beeps, no video output, resetting does nothing.
When working it spins up HD and DVDRW then beeps, screen comes up, all is well.
I've tried running it with 1 or no sticks of ram, it beeps when there's no ram like it should and I dont have any good DDR2 to test on it and it's not doing what I've seen the DS3 do when the memory is badly seated/running too fast, which is turning itself off and on until its happy.
To be honest, I've only seen this stuff happen when cpus die, and I'm really worried it's that
